Periodic Trends

Front

What is shielding in the context of atomic structure?

Back

Shielding refers to the phenomenon where inner electrons repel outer electrons, reducing the effective nuclear charge felt by the outer electrons.

Front

How does shielding affect the ease of removing electrons from an atom?

Back

A high level of shielding makes it easier to remove electrons from the atom because the outer electrons feel less attraction to the nucleus.

Front

Which element has a larger atomic radius: K or K+?

Back

K has a larger atomic radius than K+ because K+ has lost an electron, resulting in a stronger attraction between the remaining electrons and the nucleus.

Front

What ionic charge do halogens typically form?

Back

Halogens typically form a -1 ionic charge when they gain an electron.

Front

Arrange the following elements in increasing order of atomic radii: F, N, B.

Back

F < N < B. Atomic radius increases down a group and decreases across a period.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does element E have?

Back

Element E has 3 valence electrons.

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases as you move down a group due to the addition of electron shells.

Front

What is the trend in electronegativity as you move across a period from left to right?

Back

Electronegativity increases as you move from left to right across a period due to increasing nuclear charge.

Front

Define electronegativity.

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.